Update README.md

Author: MysteryVaibhav

README.md

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 # leetcode_company_wise_questions
-This is a repository containing the list of company wise questions available on leetcode premium
+This is a repository containing the list of company wise questions available on leetcode premium.
+
+Every pdf file in this repository corresponds to a list of questions on leetcode for a specific company based on the _leetcode company tags_. The list of questions within each pdf is further sorted by their frequency, so the most popular question for a specific company is at the top.